A few nice online photos images I found:
Dodgy circle chart in today's Helsinki Metro
Image by hugovk
The Metro newspaper polls their readers daily with yes/no questions and present the results in a circle chart. They're confusing to read: it's much harder to compare areas in a circle compared to a standard bar chart (here's a good example). By glancing, or without seeing the labels, it's hard to guess the relative values. And are they comparing areas or diameters?
Let's look at today's results: "Do you like street musicians?"
31% Yes
69% No
I did some sums. I measured the diameters in pixels from the online version.
The area of the yellow "yes" circle is 49,875 pixels (or 72%) and the white "no" circle is 19,113 pixels (27%). OK, it's clearly not area.
Is it diameter? The "Yes" circle is 126 pixels wide (61%) and the "no" circle is 78 pixels wide (38%). OK, it's clearly not diameter either.
Perhaps they're comparing just the yellow area against the white area. The yellow area is 49,875 pixels - 19,113 pixels, or 30,762 pixels (61%) and the white are is still 19,113 pixels (38%). Nope, that's definitely not it either.
Perhaps they're comparing the diameter of the yellow circle minus that of the white one (96 pixels, 38%), with the white one (156 pixels, 61%). Well, at least the majority is on the correct side, but it's still wrong.
So I checked last Thursday's issue where "yes" was the majority with 81%. But look! They use the exact same circle chart but just change the numbers! So the areas and diameters mean nothing! The circles mean nothing!
Here's today's and last Thursday's side-by-side.
Tabular wulfenite
Image by MuseumWales
Tabular wulfenite on hemimorphite from Bwlchrhennaid Mine. Photo: M.P. Cooper
Plwm melyn (wlffenit) byrddol ar hemimorffit, o Fwynglawdd Bwlchrhennaid. Llun: M.P. Cooper.
For more information, see the Museums online crystal gallery
Good news of today.....
Image by Sachmanns.dk
Got his SMS today.
Finally Mette N got her broadband/DSL connection. More photos uploaded to flickr & I guess Madrid is online by now...
Congratulations to Asger on the temporary job...
